英语翻译超声波测距法迅速,方便,易于做到实时控制,提过基于单片机的超声测距系统的设计能更加深入地了解单片机的实际应用.本

英语翻译
超声波测距法迅速,方便,易于做到实时控制,提过基于单片机的超声测距系统的设计能更加深入地了解单片机的实际应用.
本设计采用以单片机为核心的低成本、高精度、微型化数字显示超声波测距仪的硬件电路和软件设计.系统启动后,超声波发射头发射的超声波在空气中传播一段时间后经前方被检测物体反射回来,由超声波接收头接收,超声波电路中的接收芯片对信号放大整形,超声波接收电路接收回波后发出一个下拉电平使单片机进入中断程序,在中断程序中,单片机从温度检测电路读取数值并换算成当前温度下的声速,应用时差法计算所检测的距离,最后所有的数据都在LCD显示电路上显示.整个设计采用模块化设计,在硬件方面,包括单片机模块、温度补偿模块、超声波收发模块、LCD显示模块.在软件设计方面通过总程序将超声波测距程序模块、显示程序模块、温度测量程序模块、外部中断模块有机地结合在一起.各探头的信号经单片机综合分析处理,实现超声波测距仪的各种功能.在此基础上设计了系统的总体方案,最后通过硬件和软件实现了各个功能模块.相关部分附有硬件电路图、程序流程图.
经实验证明,这套系统软硬件设计合理、抗干扰能力强、实时性良好,经过系统扩展和升级,可以有效地解决汽车倒车等问题.

Ultrasonic ranging method is rapid, convenient, simple, easy to achieve real-time control, mentioned the ultrasonic distance measurement system based on MCU design can be more in-depth understanding of SCM application.
This design uses a microcontroller as the core of low cost, high precision, miniaturization digital display ultrasonic rangefinder hardware circuit and software design. After starting the system, an ultrasonic emission head emission of ultrasonic transmission in the air after a period of time in front of the objects to be detected by the reflected back by the ultrasonic receiving head, ultrasonic receiving circuit, the receiving chip for signal amplification shaping, ultrasonic receiving circuit receives the echo after sending a drop level to enter the interrupt program, in the interrupt program SCM temperature detection circuit, from reading the numerical and converting the current temperature velocity, using the time difference method to calculate the detection distance, finally all the data in the LCD display circuit displays. The design uses the modular design, the hardware, including the microcontroller module, temperature compensation module, ultrasonic receiving module, LCD module. In software design, through the general program will ultrasonic ranging program module, display module, temperature measurement program module, external interrupt module organically unifies in together. The probe signal by single chip integrated analysis and processing, to achieve various functions of ultrasonic ranger. On the basis of the overall system design, hardware and software by the end of each function module. Relevant portion enclosing the hardware circuit diagram, program flow chart.
Proved by experiment, the system hardware and software design is reasonable, strong anti-interference ability, good real-time, after the system expansion and upgrade, can effectively solve the problem of car reversing.